Pump



April 28, 1953 J, R, FREI 2,636;667

PUMP

Original Filed Nov. 18, 1942 Patented Apr. 28, `1951? PUMP Jakob R. Frei, Sidney, N. Y., assignor to Bendix Aviation Corporation, New York, N. Y., a corporation of Delaware Original application November 18, 1942, Serial No.

466,047, now Patent No. 2,491,100, dated December 13, 1949.

Divided and this application September 27, 1947, Serial No. 776,455

7 Claims.

This invention relates to pump means and more particularly to a rotary fluid pressure pump adapted for supercharging purposes.

This application is a division of my co-pending application Serial No. 466,047, led November 18, 1942, for Pump (now Patent No. 2,491,100, dated December 13, 1949).

One object of the present invention is to pro vide a rotary pump of novel construction whereby continuous, eiicient and safe operation of the same is assured.

Another object of the invention is to provide a rotary pump having novel means for constantly supplying lubricant to the movable parts thereof.

The above and further objects and novel fea tures of the invention will more fully appear from the following detailed description w en the same is read in connection with the accompanying drawings. It is to be expressly understood, however, that the drawings are for the purpose of illustration only and are not intended as a denition of the limits of the invention, reference for this latter purpose being primarily had to the appended claims.

In the drawings, wherein like reference characters refer to like parts throughout the several views,

Fig. 1 is a sectional view of one form of pump apparatus embodying the present invention, the section being taken substantially along a plane co-incident with the axis of rotation of the drive means for the` apparatus;

Fig. 2 is a sectional view taken substantially along line 2--2 of Fig. 1; and,

Fig. 3 is a sectional View taken substantially along line 3 3 of Fig. 1.

Referring to the drawings, there is shown an embodiment of the invention adapted for use, for example, as the supercharging means for the distributor of the ignition system of an internal combustion engine. As shown, the novel pump apparatus comprises an outer or main housing consistingl of two sections It and ii separated along a transverse plane and connected together by suitable means, such as screws or bolts l2. Sections lll and Ii are preferably provided with a plurality of holes I 3 (Fig. 3) adapted for receiving bolts or other suitable holding means whereby said housing may be operatively mounted in another housing to be supercharged or connected to an engine casing within said supercharged housing.

Within housing I0, I I there is mounted a pump casing comprising end plates l l and a cylindrical 'Wall member I5, which parts are held in Operative axial position relative to each other by sections Ili and I I. One or more holding members, such as pins IS (Fig, l), may be provided in each housing section for cooperation with said end plates to prevent angular movement of the latter relative to said housing, and suitable means, such as pins (not shown), may be employed to hold the parts of casing I4, I5 in xed angular relation to eachv other. Eccentrically mounted relative to said casing is a hollow rotor shaft I7 which has the ends thereof suitably journaled in bearings I 8 preferably provided in each 01 sections I0, Il, Said bearings serving also to axially position said shaft.

Concentrically mounted on rotor shaft I1 in casing I4, I5 so as to be eccentric to the latter is a pump rotor I 9 which is secured, for example, by a key 20- (Fig. 3) to said rotor shaft for rotation therewith. Key 20 is preferably formed from a readily shearable material so that if said rotor seizes or becomes otherwise locked against movement during operation, the key will be first to fail and will thereby protect the pump lstructure and the drive means connected thereto against damage and also permit continued operation of the other parts. A plurality of radial slots 2| are provided in said rotor and each of said slots is adapted to slidably receive a vane or blade 22 so that during operation of said rotor, said vanes are centrifugally actuated into operative engagement with the inner wall of casing member l5. Said vanes are preferably formed from molded phenolic material. Each pair of said vanes cooperates with the inner walls of casing I4, i 5 to form a peripheral pressure chamber therein, the latter having a volume which varies from a minimumto a maximum during each revolution of the rotor.V

Suitable means are provided in the illustrated embodiment to admit air to each `oi the pressure chambers as the latter attain a maximum volume and to discharge air from each of said chambers as the latter approach a minimum volume. As shown, the air admission means comprises a suitable passageway in housing Il), II, which connects with an inlet port 23 in casing Id, I5, said port being provided in wall member i5 and connecting with atransverse groove 24 in the inner surface of said member. Said groove subtends a substantial arc `in the direction of travel of the vanes and is adapted to connect said port with each` pressure chamber from the time shortly aftervair is discharged from said chamber until the time the chamber assumes its maximum volume. The inlet passageway in tion of the limits of the invention, reference is had primarily to the appended claims.

What is claimed is:

1. A. rotary type pump comprising a, hollow casing, the ends of said lcasing having aligned openings therein, a porous metallic sleeve in each of said openings and projecting axially outward from said ends, a rotor` in said casing, thrust members carried by said rotor at oppo-l site ends thereof and slidably contacting the inner ends of said sleeves, oil soaked fibrous means surrounding yand contacting the outwardly eX- tending projections of said sleeves, driving means for said rotor including a shaft slidably extending through said sleeves, and means for rotatably supporting said shaft independently of said casing and sleeves.

2. In apparatus of the class described, a rotor, a casing for said rotor, at least one end of which has an opening therein, a, porous metallic sleeve fixed in said casing `and extending outwardly through said opening, a metallic thrust ring embedded in the -adjacent end wall of said rotor Wi'th its outer `surface subs'tantially iiush with the outer surface of said end wall, said thrust ring slidably engaging the inner end of said sleeve, oil soaked means surrounding and contacting the outwardly extending portion of said sleeve, a housing surrounding and supporting said casing, rotatable driving means journalled in said housing and supported independently of said casing and sleeve, and means for drivably connecting said rotor to said driving means.

3. In a rotary pump of the class described, a housing, a pump casing mounted in said housing and comprising fixed side and peripheral Walls, a rotor rotatably mounted in said casing, drive means for said rotor journalled in said housing, a thrust member carried by said rotor outwardly thereof and surrounding said drive means, and means for lubricating said rotor and said drive means, said lubricating means comprising a flanged porous metallic bushing fixed in at least one of said casing side Walls Iand surrounding and contacting said drive means, the flange of said bushing being disposed interiorily of said casing and engaging said thrust member, and oil saturated fibrous means engaged with said bushing.

4. In apparatus of the class described, a housing, a 'pump casing mounted in said housing and comprising fixed side and peripheral Walls, a rotor rotatably mounted in said casing, drive means for said rotor journalled in said housing, thrust rings embedded in the end walls of said rotor with their outer surfaces substantially flush with the outer surfaces of said end walls, and means for lubricating said drive means and said rotor, said lubricating means comprising a flanged porous metallic bushing xed in each of said casing side walls and surrounding and contacting said drive means, the anges of said bushings being embedded in the inner surfaces of said casing side Walls and projecting inwardly beyond said surfaces into contact with said thrust rings, and said bushings having ends thereof projecting yaxially outward from said casing side Walls, and oil saturated fibrous means surrounding and contacting the outwardly projecting ends of said bushings.

5. In apparatus of the class described a housing, a pump casing mounted in said housing, said casing having xed side and peripheral walls, driving means rotatably supported in said housing independently of said casing, a rotor in said casing mounted on said driving means for rotation therewith, a flanged porous metallic bushing fixed in at least one of said casing side Walls and surrounding and contacting said driving means, the iiange of said bushing being disposed interiorly of said c-asing and projecting inwardly beyond the inner surface of said side wall into contact with said rotor to absorb axial thrust of the latter, and lubricant-saturated means contacting the end of said bushing outside the casing whereby the driving means and the rotor are lubricated through said bushmg.

6. Apparatus as deiined in claim 5 4embodying one of said porous metallic bushings vand said lubricating means at each side of the casing.

7. Apparatus as dened in claim 5 wherein the outer end of said bushing projects axially outward from the outer surface of the casing side wall and is surrounded and contacted by said lubricant-saturated means.

` JAKOB R. FREI.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Hawkins July 3, 1923` 

